Stone-working machine



(No ModeL) 2 Sheets-Sheet 1.

P. OHRISTA.

STONE WORKING MACHINE.

No. 329,274. Patented Oct. 2'7, 1885.

WVEJVTOR N, PEYCns. Pnmo-Lnhu hm, wamin tnn, D4 C.

(No Model.) 2 Sheets-Sheet 2.

P. UHRISTA.

\ STONE WORKING. MACHINE. No. 329,274. Patented 001;. 2'7, 1885.

:qyumm J L W I "[{MH-f "Till 1 FW V UNITED STATES PATENT rrrcn.

PHILIP OHRISTA, OF DETROIT, MICHIGAN.

STONE-WORKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 329,274, dated October 27, 1 885.

Application filed November 12, 1884. Serial No. 147, 736. (No model.)

To all whom it may concern.-

Be it known that I, PHILIP CHRISTA, a citizen of the Un1ted States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Improvement in Stone-Working Machines, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to stone-working machines, and more particularly to that class of the same which are employed to dress, grind, clean, or polish marble and the like; and the object of the invention is to providea machine of this character, which will be simple and inexpensive in construction, and effective in use, thoroughly polishing or dressing around and into the moldings or other work formed on or in the stone.

With these ends in view the said invention consists in certain details of construction and combination of parts, as hereinafter set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front elevation, partly broken away, of my improved stone-working machine. 2 is a plan view of the same. Fig. 3 is a side elevation, broken away at parts. Fig. i is a detail sectional View of the upper end of one of the supporting-standards for the roller, showing more clearly the connection of the chain-wheel to keep the latter from working down on the screw after the proper adjustment has been effected.

Like letters are used to indicate corresponding parts in the several figures.

Referring to the drawings, Adesignates the frame of the machine, supported on legs B,and having its upper face provided with a pair of longitudinal strips, 0, one on each side, which strips are pointed at the upper edge and form guideways for the sliding table D, the latter having grooved longitudinal projections E provided on the under side of the same and resting on the strips 0. At each side of the frame is disposed a vertical upright or standard, F, slotted vertically at a to receive the bearing-blocks b of the cylindrical roller G, the shaft H of which extends at one end beyond one of the uprights or standards F, and has a band-wheel, I, mounted thereon. The

bearing-blocks b of the roller are vertically Fig.

adjustable in the slot a by means of the vertically-disposed screws J, which extend upward through the slot above the uprights. Ohain-wheelsK K are mounted on and engage with the screws, and are formed with downward extensions (1 d, which are provided with an annular groove, 6, registering with the holes f, formed in the upper end of the uprights, a pin, M, passing through the holes and fitting in the groove e,so as to form bearings for the wheels K and hold the latter from verti cal movement. A chain, L, connects the two wheels so as to cause them to act together.

The roller G is preferably constructed of metal, and is perfectly smooth, and since it revolves over the face of the stone it is nec essary that it should be adjusted to the thickness of the same. The wheels K have a horizontal motion about their axes, and when they are operated the screws J are worked upwardly within and through the wheels. By the turning of one wheel its connection w1th the other wheel by the chain L causes it to work in a similar manner, and thus each wheel will be adjusted on the screws in a corresponding degree. The working of the wheels upon the screws serves to elevate or lower the bearing-blocks b in the slots a, and consequently adjust the roller G to the thickness of stone which is placedupon the sliding table.

N designates a shaft mounted in the frame A, and provided at its inner end with a bevelgear, 0, which meshes with a similar gear, P,

mounted rigidly on a screw, Q, the ends of the latter Working through threaded openings formed in the depending lugs R R, which project from the table D and at opposite ends.

It will be observed that the operation of the feed-shaft N causes the gear 0 to operate the gear P and work the screw Q through the lugs R, thereby causing the table to work forward or backward on the ways before mentioned, so that the roller G may act upon all parts of the stone.

On the outer end of the feed-shaft N is mounted a ratchet-wheel, S, with which engages a detent-pawl, T, to holdit from moving backward until said detent is withdrawn from engagement. A feed-dog, U, also engages with the ratchet-wheel,and is acljustably connected to the drive-Wheel V, mounted in dog the latter is given a greater or less throw,

accordingly as it is adjusted to or from t e suitable boxes upon the frame A, the shaftof said drive-wheel being operated by steam or other power.

The connection of the feed-dog to the drivewheel, as shown clearly in the drawings, consists of a threaded extension of the dog fitting in a slot of one of the spokes or arms of the wheel, a binding-nut being employed to hold the extension at any point of the slot. By this adjustment of the pivot-point of the feedrim of the wheel V, and this increase or decrease in the pitch of the feed-dog causes it to 1 engage with a corresponding greater or less number of teeth of the ratchet-wheel S, to operate thefeed-shaft N fast or slow, as desired. A band, W, connects the drive-wheel with the band-wheel I, so as to communicate motion to the roller G and cause the latter to D, and the roller G is adjusted to suit the the ratchet-wheel S, to turn the latter, and

likewise move the feed-shaft N, which works the table D forward a certain distance until the other end of the stone is reached. The

feed-dog and the detent-pawl may then be disengaged from the ratchet-wheel, and the handle X on the latter operated to return the table to its former position. As will be understood, the action of the feed-dog on the ratchetwheel is intermittent, so as to give a partial rotary movement to the feed-shaft, and by means of the connection of the latter with the table cause the same to move a corresponding short distance, and thus allow the roller to act thoroughly upon all parts of the stone. It will be apparent that the revolving action of the metallic roller, in connection with the sand, emery, and other grits with water, will serve to effectually grind the face of the stone and highly polish the same. The revolving action of the roller keeps the sand and water in constant motion from one side of the stone to the other.

My invention is simple and inexpensive in construct-ion, and efficient in use, and will prove of great utility for the purposes intended.

Having described my invention, I claim-- 1. In a stone-Working machine, the frame, in combination with the adjustable roller, the sliding table, and means, substantially as described, for revolving the roller, and at the At each complete revolution of same time automatically nioying'tl e sliding are "a nest e? n rfll for the purpose set" forth.

2. In a stone-working machine, the frame, in combination with the adjustable roller, the sliding table, the feed-shaft for the latter carryingthe-ratchet-wheel at one end, the operating means for the roller, -and a pawl or feeddog engaging with the ratchet-wheel and connecting with the operating means, said feeddog operating automatically upon a certain number of the teeth of the ratchet-wheel at regular intervals, as set forth.

3. In a stone-working machine, the frame provided with supporting-uprights, and the roller having its bearing-blocks fitted in the same, in combination with the screws engag ingwith the blocks, wheels turning on the screws and connected by chain or band, and

a pin or bolt for holding the wheels to the uprights and forming bearings for the wheels, so as to prevent the upward movement thereof, as set forth.

4:. In a stone-working machine, the combination,w ith the frame provided with supporting-uprights, and the roller having its bearin g-blocks journaled in the latter, of screws engaging with the bearing-blocks, wheels turning on the screws and connected by a chain or band, and means, substantially as described, for holding the wheels to the uprights, and yet allowing their horizontal movement at will, as set forth.

5. In a stone-working machine, the combination, with the frame, of the adjustable roller, the sliding table, the feed-shaft. for the latter carrying a ratchet-wheel at one end, a

drive-wheel for communicating motion to the roller, and a feed-dog connecting the drivewheel with the ratchet to give a slight forward movement automatically and at regular intervals to the same, as set forth.

6. In a stone-working machine, the combination, with the frame, of the adjustable roller carrying a band-wheel at one end, a sliding table moving on ways of the frame, a I

screw for operating the table, a shaft conveying motion to the screw, a drive-wheel communicating motion to the aforesaid bandwheel, and means, substantially as described, for communicating to said feed-shaft from the drive-wheel a partial rotary movement, as set forth. 7. In a stone-working machine, the combination, with the frame, of the adjustable rollnation, with the frame, of the adjustable rollwith the ratchet-wheel and adj ustably attached or carrying a band-wheel at one end, a slidto the drive-wheel, as set forth.

ing table moving on suitable ways, lugs de- In testimony that I claim the foregoing as pending from the table, a screw working my own I have hereto affixed my signature 5 through the lugs, a gear-wheel mounted on the in presence of two witnesses.

screw, a feed-shaft carrying a gear-wheel en- Y gaging with the other, aratchet-wheel on the PHILIP (JHRISTA' outer end of the shaft, a detent-pawl, a drive- Witnesses:

wheel connecting by a band with the wheel on 0. W. RUSSELL, IO the end of the roller, and a feed-dog engaging F. G. RUSSELL. 

